FERROUS ZEOLITE, METHOD FOR PRODUCING FERROUS ZEOLITES, AND METHOD FOR CATALYTICALLY REDUCING NITROUS OXIDES

    公开(公告)号:ZA201205261B

    公开(公告)日:2013-09-25

    申请号:ZA201205261

    申请日:2012-07-16

    Applicant: BASF SE

    Abstract: Described is an iron-containing zeolite wherein the number of iron sites, based on the zeolite, is greater than the number of cationic positions in the zeolite. Also described is an iron-containing zeolite preparable by gas phase reaction with iron pentacarbonyl, said zeolite having a greater specific surface area than iron-containing zeolites prepared analogously by ion exchange and/or being more hydrothermally stable than iron-containing zeolites prepared analogously by ion exchange, or wherein the number of iron clusters larger than 10 nm is less than 15% by weight, based on the total amount of iron. Further described is a process for preparing an iron-containing zeolitic material, which comprises doping with iron by means of a gas phase reaction using iron pentacarbonyl. Further described is a process for catalytic reduction of nitrogen oxides using catalysts comprising said iron-containing zeolitic materials.

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